Adjustable projector bracket assembly

ABSTRACT

An adjustable projector bracket assembly has a pivoting device, a moving device and an adjusting device. The moving device is slidably connected with the pivoting device and has a bottom. The adjusting device is mounted on the bottom of the moving device and has a projector bracket and at least three supporting arms. The projector bracket has at least three arm grooves formed through the projector bracket. The at least three supporting arms are respectively pivotally and slidably connected with the at least three arm grooves. With the supporting arms pivotally and slidably connected with the arm grooves, projectors P of different sizes or having different assembling holes can be mounted securely on the projector bracket.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus which can fix a projector,and more particularly to an adjustable projector bracket assembly.

2. Description of Related Art

A conventional projector bracket assembly is mounted securely on aceiling and is connected securely with a projector to hang the projectoron the ceiling. However, the conventional projector bracket assembly isconnected with the projector of a specific size and cannot be adjustedto fit different projectors of different sizes. Consequently, to use theconventional projector bracket assembly is inconvenient.

To overcome the shortcomings, the present invention tends to provide anadjustable projector bracket assembly to mitigate the aforementionedproblems.

SUMMARY OF THE INVENTION

The main objective of the invention is to provide an adjustableprojector bracket assembly which can be mounted securely with differentprojectors with different sizes.

An adjustable projector bracket assembly has a pivoting device, a movingdevice and an adjusting device. The moving device is slidably connectedwith the pivoting device and has a bottom. The adjusting device ismounted on the bottom of the moving device and has a projector bracketand at least three supporting arms. The projector bracket has at leastthree arm grooves formed through the projector bracket. The at leastthree supporting arms are respectively pivotally and slidably connectedwith the at least three arm grooves. With the supporting arms pivotallyand slidably connected with the arm grooves, projectors P of differentsizes or having different assembling holes can be mounted securely onthe projector bracket.

Other objects, advantages and novel features of the invention willbecome more apparent from the following detailed description when takenin conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an adjustable projector bracket assemblyin accordance with the present invention;

FIG. 2 is an enlarged exploded perspective view of the adjustableprojector bracket assembly in FIG. 1;

FIG. 3 is an enlarged cross sectional top view of the adjustableprojector bracket assembly in FIG. 1;

FIG. 4 is an enlarged perspective view in partial section of theadjustable projector bracket assembly in FIG. 1;

FIG. 5 is an exploded perspective view of the adjustable projectorbracket assembly in FIG. 4; and

FIG. 6 is a side view in partial section of the adjustable projectorbracket assembly in FIG. 4;

FIG. 7 is an operational bottom view of the adjustable projector bracketassembly in FIG. 4; and

FIG. 8 is an operational side view in partial section of the adjustableprojector bracket assembly in FIG. 6.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

With reference to FIGS. 1 to 3, an adjustable projector bracket assemblyin accordance with the present invention comprises a pivoting device 10,a moving device 20 and an adjusting device 30.

The pivoting device 10 has a base 11, an upper cover 12, a lower cover13, a beam 14 and a strip 15.

The base 11 has a top, a bottom, a connecting surface 111, a wallsurface, a protrusion 112 and a pivot tube 113. The wall surface isopposite to the connecting surface 111 and is mounted securely on a wallW. The protrusion 112 protrudes laterally from the connecting surface111 and has a top. The pivot tube 113 is longitudinally mounted securelyon the top of the protrusion 112 and is separated from the connectingsurface 111. The upper cover 12 and the lower cover 13 are respectivelymounted securely on the top and the bottom of the base 11.

With further reference to FIG. 4, the beam 14 is elongated, is mountedlaterally on and connected pivotally to the base 11. The beam 14 has apivoting end 141, a bottom surface 142, a mount groove 143 and a pillarsection 144. The pivoting end 141 is rotatably mounted around the pivottube 113. The mount groove 143 is elongated and is formed in the bottomsurface of the beam 14. The pillar section 144 is elongated and isformed at the pivoting end 141.

With reference to FIG. 3, preferably, the pivoting device 10 has a strip15. The strip 15 is made of plastic, is mounted securely on theconnecting surface 111 and has two ends and a concave section 151. Theconcave section 151 is arcuated, is formed between the ends of the strip15 and abuts and engages the pillar section 144. With the engagementbetween the pillar section 144 and the concave section 151 of the strip15, the beam 14 is kept from being pivoted abruptly and quickly and theshake of a projector P can be prevented.

Preferably, the pivoting device 10 has a blocking bolt 16 and a blockingring 17. The blocking bolt 16 is longitudinally screwed securely intothe top of the protrusion 112 beside the pivot tube 113 and is adjacentto one of the ends of the strip 15. The blocking ring 17 is rotatablymounted around the blocking bolt 16 and selectively abuts with thepillar section 144. The blocking ring 17 is used to restrict a pivotingrange of the beam 14, and the location of the blocking bolt 16 and theblocking ring 17 is not limited and can be at a position adjacent to anyend of the strip 15.

With reference to FIGS. 4 to 6, the moving device 20 is slidablyconnected with the pivoting device 10 and has a moving mount 21, twoclamps 22 and a mount bolt 23. The moving mount 21 is mounted below thebeam 14 and has a head and a bottom opposite to the head. The clamps 22are reversed L-shaped, are slidably mounted in the mount groove 143, aremounted in and protrude out from the head of the moving mount 21 and arecapable of approaching each other. One of the clamps 22 has a threadedhole formed through the clamp 22. The mount bolt 23 is rotatably andradially mounted in the head of the moving mount 21 and through theclamps 22. The threaded hole of the clamp 22 is movably mounted aroundthe mount bolt 23. When the clamps 22 are moved away from each other,the clamps 22 press two inner surfaces of the mount groove 143 to securethe moving device 20 on the beam 14. When the clamps 22 are movedclosely to each other, the moving device 20 can be moved along the mountgroove 143. The clamps 22, the mount groove 143 and the mount bolt 23may be conventional and detailed description is omitted.

With reference to FIGS. 4 to 6, the adjusting device 30 is rotatablymounted on the bottom of the moving mount 21 and has a projector bracket31 and at least three supporting arms 32. The projector bracket 31 isround, is mounted below the bottom of the moving mount 21 and has atleast three arm grooves 311 formed through the project bracket 31. Theat least three supporting arms 32 are respectively connected pivotallyand slidably to the at least three arm grooves 311. Each supporting arm32 has an adjusting end 321 and a mounting end 322 opposite to theadjusting end 321. The adjusting end 321 is slidably connected with acorresponding arm groove 311 via a bolt. The mounting end 322 has athrough hole 3221 formed though the mounting end 322. Preferably, thethrough holes 3221 are threaded and can be securely connected with aprojector P with bolts. With reference to FIG. 7, because the supportingarms 32 are pivotally and slidably connected with the arm grooves 32,projectors P of different sizes or having different assembling holes canbe mounted securely on the projector bracket 31.

Preferably, four arm grooves 311 are implemented and are spaced atintervals. The projector bracket 31 has an outer edge and a centralposition 312. The arm grooves 311 are arcuated and elongated from thecentral position 312 to the outer edge of the projector bracket 31 in anoperational rotation direction, such as in clockwise as shown in FIGS. 5and 7. With the arm grooves 311, the supporting arms 32 can be movedfrom the central position 312 to the outer edge of the projector bracket31 and the positions of the supporting arms 32 can be adjusted.Accordingly, projectors P of different sizes or having differentassembling holes can be mounted securely on the projector bracket 31.

Preferably, the central position 312 of the projector bracket 31 has aconvex and round top and a concave and round bottom. The projectorbracket 31 has an elongated angle adjusting groove 313 formed throughthe central position 312 of the projector bracket 31. The adjustingdevice 30 further has two pads 33, a washer 34 and a positioning pin 35.The pads 33 respectively abut the top and the bottom of the projectorbracket 31. The washer 34 abuts the pad 33 which abuts the bottom of theprojector bracket 31. The positioning pin 35 may be a bolt, islongitudinally mounted through the angle adjusting groove 313, the pads33 and the washer 34 and is screwed securely into the bottom of themoving mount 21. With reference to FIG. 8, after the positioning pin 35is released, the projector bracket 31 can be slid and pivoted along theangle adjusting groove 313 at the center at the positioning pin 35 toadjust angles of elevation and depression of the projector P.

From the above description, it is noted that the present invention hasthe following advantages:

1. Versatile Assembly for Different Projectors P:

Because the supporting arms 32 are pivotally and slidably connected withthe arm grooves 311, the supporting arms 32 can be moved from thecentral position 312 to the outer edge of the projector bracket 31 alongthe arm grooves 311. Accordingly, the projector bracket assembly inaccordance with the present invention can be adjusted to fit withprojectors P of different sizes or having different assembling holes.

2. Easy Adjustment of the Angles of the Elevation and Depression of theProjector P:

Because the central position 312 of the projector bracket 31 has aconcave and round bottom through which the angle adjusting groove 313 isformed, the projector bracket 31 can be slid along the angle adjustinggroove 313 and the angles of elevation and depression of the projector Pcan be further adjusted.

3. Multidirectional Adjustment of the Projector P:

The projector P can be pivoted by the pivoting device 10, can be slid bythe moving device 20 and can be rotated by the adjusting device 30, suchthat the position of the projector P can be adjusted in multi-directionsand this is very convenient.

4. Steady Pivotal Movement of the Projector P:

With the engagement between the pillar section 144 and the concavesection 151 of the strip 15, the beam 14 can be kept from being pivotedabruptly and quickly and the shake of the projector P is prevented.

5. Restriction on the Pivoting Range of the Beam 14:

The blocking ring 17 can provide a restricting effect to the pivotingrange of the beam 14 to keep the projector P from being horizontallymoved too much.

Even though numerous characteristics and advantages of the presentinvention have been set forth in the foregoing description, togetherwith details of the structure and function of the invention, thedisclosure is illustrative only, and changes may be made in detail,especially in matters of shape, size, and arrangement of parts withinthe principles of the invention to the full extent indicated by thebroad general meaning of the terms in which the appended claims areexpressed.

What is claimed is:
 1. An adjustable projector bracket assemblycomprising: a pivoting device having a base; and a beam mountedlaterally on and connected pivotally to the base and having a bottomsurface; and an elongated mount groove formed in the bottom surface ofthe beam; a moving device slidably connected with the pivoting deviceand having a moving mount mounted below the beam and having a head and abottom opposite to the head; two reversed L-shaped clamps slidablymounted in the mount groove, mounted in and protruding out from the headof the moving mount and capable of approaching each other; and a mountbolt rotatably and radially mounted in the head of the moving mount andthrough the clamps; and an adjusting device mounted on the bottom of themoving mount and having a projector bracket mounted below the bottom ofthe moving mount and having at least three arm grooves formed throughthe project bracket; and at least three supporting arms respectivelyconnected pivotally and slidably to the at least three arm grooves, eachsupporting arm having an adjusting end slidably connected with acorresponding arm groove; and a mounting end opposite to the adjustingend and having a through hole formed though the mounting end.
 2. Theadjustable projector bracket assembly as claimed in claim 1, wherein theprojector bracket has an outer edge and a central position; and the armgrooves are arcuated and elongated from the central position to theouter edge of the projector bracket in an operational rotationdirection.
 3. The adjustable projector bracket assembly as claimed inclaim 2, wherein the central position of the projector bracket has aconvex and round top and a concave and round bottom; the projectorbracket has an elongated angle adjusting groove formed though thecentral position of the projector bracket; and the adjusting device hasa positioning pin being a bolt, longitudinally mounted through the angleadjusting groove and screwed securely into the bottom of the movingmount.
 4. The adjustable projector bracket assembly as claimed in claim3, wherein the pivoting device has a strip; the base has a connectingsurface; a wall surface opposite to the connecting surface; a protrusionprotruding laterally from the connecting surface and having a top; and apivot tube longitudinally mounted securely on the top of the protrusionand separated from the connecting surface; the beam has a pivoting endrotatably mounted around the pivot tube; and the strip is mountedsecurely on the connecting surface and abuts the pivoting end.
 5. Theadjustable projector bracket assembly as claimed in claim 4, wherein thestrip has two ends; and the pivoting device has a blocking boltlongitudinally screwed securely into the top of the protrusion besidethe pivot tube and being adjacent to one of the ends of the strip; and ablocking ring rotatably mounted around the blocking bolt.
 6. Theadjustable projector bracket assembly as claimed in claim 1, whereinfour arm grooves are implemented and are spaced at intervals.
 7. Theadjustable projector bracket assembly as claimed in claim 2, whereinfour arm grooves are implemented and are spaced at intervals.
 8. Theadjustable projector bracket assembly as claimed in claim 3, whereinfour arm grooves are implemented and are spaced at intervals.
 9. Theadjustable projector bracket assembly as claimed in claim 4, whereinfour arm grooves are implemented and are spaced at intervals.
 10. Theadjustable projector bracket assembly as claimed in claim 5, whereinfour arm grooves are implemented and are spaced at intervals.